flask-sqlalchemy | Adds SQLAlchemy support to Flask | SQL Database library

 by   pallets Python Version: 2.5.1 License: BSD-3-Clause

kandi X-RAY | flask-sqlalchemy Summary

kandi X-RAY | flask-sqlalchemy Summary

flask-sqlalchemy is a Python library typically used in Database, SQL Database applications. flask-sqlalchemy has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has high support. You can install using 'pip install flask-sqlalchemy' or download it from GitHub, PyPI.

Adds SQLAlchemy support to Flask

            kandi-support Support

              flask-sqlalchemy has a highly active ecosystem.
              It has 3701 star(s) with 871 fork(s). There are 113 watchers for this library.
              It had no major release in the last 12 months.
              There are 40 open issues and 524 have been closed. On average issues are closed in 115 days. There are 23 open pull requests and 0 closed requests.
              It has a positive sentiment in the developer community.
              The latest version of flask-sqlalchemy is 2.5.1

            kandi-Quality Quality

              flask-sqlalchemy has 0 bugs and 0 code smells.

            kandi-Security Security

              flask-sqlalchemy has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              flask-sqlalchemy code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              flask-sqlalchemy is licensed under the BSD-3-Clause License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              flask-sqlalchemy releases are available to install and integrate.
              Deployable package is available in PyPI.
              Build file is available. You can build the component from source.
              flask-sqlalchemy saves you 1032 person hours of effort in developing the same functionality from scratch.
              It has 2375 lines of code, 228 functions and 45 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed flask-sqlalchemy and discovered the below as its top functions. This is intended to give you an instant insight into flask-sqlalchemy implemented functionality, and help decide if they suit your requirements.
            • Retrieves pagination items from the given request .
            • Configures the driver pool to use .
            • Creates a new app .
            • Iterate over pages .
            • Constructs a table from its arguments .
            • Returns true if table names should be set .
            • Gets debug queries .
            • Registers a user .
            • Handles the login request .
            • Handles a post .
            Get all kandi verified functions for this library.

            flask-sqlalchemy Key Features

            No Key Features are available at this moment for flask-sqlalchemy.

            flask-sqlalchemy Examples and Code Snippets

            Flask-SQLAlchemy-API Reference
            Pythondot img1Lines of Code : 0dot img1no licencesLicense : No License
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            Flask-SQLAlchemy-User Guide
            Pythondot img2Lines of Code : 0dot img2no licencesLicense : No License
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            Flask-SQLAlchemy-Additional Information
            Pythondot img3Lines of Code : 0dot img3no licencesLicense : No License
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            docker-compose up ModuleNotFoundError: No module named 'sqlalchemy'
            Pythondot img4Lines of Code : 23dot img4License : Strong Copyleft (CC BY-SA 4.0)
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            FROM python:3.8
            WORKDIR /usr/src/app
            COPY requirements.txt ./
            RUN pip install --no-cache-dir -r requirements.txt
            COPY . .
            CMD [ "python", "./app.py" ]
            version: '3'
                build: ./
            How to query SQLAlchemy to return a summed value of related records?
            Pythondot img5Lines of Code : 6dot img5License : Strong Copyleft (CC BY-SA 4.0)
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            q = session.query(User, func.coalesce(func.sum(Task.value), 0)).outerjoin(User.stripes).outerjoin(Stripe.related_task).group_by(User.id)
            for user, value_total in q.all():
                print(user, value)
            tasks = [stripe.rela
            Flask-Sqlachlemy parallel requests avoid raise condition
            Pythondot img6Lines of Code : 14dot img6License : Strong Copyleft (CC BY-SA 4.0)
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            # User's table row is locked until session is commited or rolled back.
            user = session.query(User).filter(User.id == current_user_id).with_for_update().first()
            # Or session.query(User).get(current_user_id, with_for_update=True)
            # Manipulat
            HTML shows Flask-SQLAlchemy syntax?
            Pythondot img7Lines of Code : 2dot img7License : Strong Copyleft (CC BY-SA 4.0)
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            replies = Reply.query.all()
            How to filter after two joins in flask SQL alchemy
            Pythondot img8Lines of Code : 18dot img8License : Strong Copyleft (CC BY-SA 4.0)
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            with Session(engine) as session:
                latest_subq = session.query(
                    Prosampair, Sample.id == Prosampair.sample_id
            Limit results from a Python SQLAlchemy query to the top results from a subgroup
            Pythondot img9Lines of Code : 26dot img9License : Strong Copyleft (CC BY-SA 4.0)
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            SELECT depname, empno, salary,
            rank() OVER (PARTITION BY depname ORDER BY salary DESC)
            FROM empsalary;
             depname  | empno | salary | rank 
             develop   |     8 |   6000 |    1
            Error committing multiple items to one table in SQLite DB model with flask-sqlalchemy
            Pythondot img10Lines of Code : 23dot img10License : Strong Copyleft (CC BY-SA 4.0)
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            # Passed variables to DB
            new_professor = Professors(
            return redirect("/registrants")
            professorA = Professors(

            Community Discussions


            Python/Docker ImportError: cannot import name 'json' from itsdangerous
            Asked 2022-Mar-31 at 12:49

            I am trying to get a Flask and Docker application to work but when I try and run it using my docker-compose up command in my Visual Studio terminal, it gives me an ImportError called ImportError: cannot import name 'json' from itsdangerous. I have tried to look for possible solutions to this problem but as of right now there are not many on here or anywhere else. The only two solutions I could find are to change the current installation of MarkupSafe and itsdangerous to a higher version: https://serverfault.com/questions/1094062/from-itsdangerous-import-json-as-json-importerror-cannot-import-name-json-fr and another one on GitHub that tells me to essentially change the MarkUpSafe and itsdangerous installation again https://github.com/aws/aws-sam-cli/issues/3661, I have also tried to make a virtual environment named veganetworkscriptenv to install the packages but that has also failed as well. I am currently using Flask 2.0.0 and Docker 5.0.0 and the error occurs on line eight in vegamain.py.

            Here is the full ImportError that I get when I try and run the program:



            Answered 2022-Feb-20 at 12:31

            I was facing the same issue while running docker containers with flask.

            I downgraded Flask to 1.1.4 and markupsafe to 2.0.1 which solved my issue.

            Check this for reference.

            Source https://stackoverflow.com/questions/71189819


            Self-referencing a table for a foreign key relationship in Flask-Sqlalchemy
            Asked 2022-Mar-31 at 07:29

            I'm sure there is an easy solution to this problem but I haven't been able to find it or think it. I have a model "Entry" which are supposed to be in sequence with each other (For instance entry 1 might be the first part of a blog post, entry 2 the second part and so on)



            Answered 2022-Mar-31 at 07:29

            The "no attribute id" error occurs because SQLAlchemy interprets 'entry.id' as referring to the underlying Table object, rather than the model. Fix this by using either 'Entry.id' (model reference) or 'entry.c.id' (table reference).

            Additionally, use back_populates rather than backref to configure the reverse relationships:

            Source https://stackoverflow.com/questions/71686980


            Anaconda FileNotFound error during pytest in vscode
            Asked 2022-Mar-25 at 07:06

            I am trying to run some pytests on vscode in a conda environment. The connection to my postgres db is handled by flask/flask-sqlalchemy and I have installed the add-ons for pytest (pytest-flask, pytest-postgresql), to use some fixtures.

            When I'm now trying to run a test (or all of them), I get the following error message:



            Answered 2022-Mar-25 at 07:06

            Could you add this to your settings.json file?

            "terminal.integrated.env.osx": { "PYTHONPATH": "{the path of pg_ctl folder}" },

            When terminal settings are used, PYTHONPATH can affect any tools that are run within the terminal.

            You can refer to the official docs for more details.

            Source https://stackoverflow.com/questions/71605794


            SQLAlchemy Joining a Session into an External Transaction Not Working as Expected
            Asked 2022-Feb-23 at 17:04

            I'm working on rewriting the test suite for a large application using pytest and looking to have isolation between each test function. What I've noticed is, multiple calls to commit inside a SAVEPOINT are causing records to be entered into the DB. I've distilled out as much code as possible for the following example:




            Answered 2022-Feb-23 at 17:04

            With the help of SQLAlchemy's Gitter community I was able to solve this. There were two issues that needed solving:

            1. The after_transaction_end event was being registered for each individual test but not removed after the test ended. Because of this multiple events were being invoked between each test.
            2. The _db being yielded from the db fixture was inside the app context, which it shouldn't have been.

            Updated conftest.py:

            Source https://stackoverflow.com/questions/71186875


            How to construct an SQLAlchemy query that first performs an arithmetic operation between two columns and returning it as a new column?
            Asked 2022-Feb-22 at 16:18

            I'm using Flask-SQLAlchemy and I have the following simplified model which I use to track the tasks that I've completed throughout the day. What I'm trying to achieve is to calculate total time spent for each recorded task grouped by task id and client id.



            Answered 2022-Feb-22 at 14:34

            You are trying to group from a column that you aren't querying.

            Try including this fields on the query

            Source https://stackoverflow.com/questions/71204388


            How to set schema_translate_map in SQLAlchemy object in Flask app
            Asked 2022-Feb-19 at 23:10

            My app.py file



            Answered 2022-Feb-19 at 23:10

            I found a way to accomplish it. This is what needed

            Source https://stackoverflow.com/questions/71099132


            How do I load the flask-sqlalchemy plugin for flycheck (pylint) on Emacs?
            Asked 2022-Feb-17 at 02:12

            If I'm running pylint from the command line, I'd load the pylint_flask_sqlalchemy plugin by running:



            Answered 2022-Feb-17 at 02:12

            You can specify options in flycheck-pylintrc("pylintrc" ".pylintrc" "pyproject.toml" "setup.cfg") in the workspace folder, which is located by the functions from flycheck-locate-config-file-functions.

            Here is an example of pyproject.toml from Github.

            Source https://stackoverflow.com/questions/71146720


            How to avoid the QueuePool limit error using Flask-SQLAlchemy?
            Asked 2022-Jan-13 at 06:59

            I'm developing a webapp using Flask-SQLAlchemy and a Postgre DB, then I have this dropdown list in my webpage which is populated from a select to the DB, after selecting different values for a couple of times I get the "sqlalchemy.exc.TimeoutError:".

            My package's versions are:



            Answered 2022-Jan-13 at 06:59

            You are leaking connections.

            A little counterintuitively, you may find you obtain better results with a lower pool limit. A given python thread only needs a single pooled connection, for the simple single-database queries you're doing. Setting the limit to 1, with 0 overflow, will cause you to notice a leaked connection earlier. This makes it easier to pin the blame on the source code that leaked it. As it stands, you have lots of code, and the error is deferred until after many queries have been issued, making it harder to reason about system behavior. I will assume you're using sqlalchemy 1.4.29.

            To avoid leaking, try using this:

            Source https://stackoverflow.com/questions/70625689


            Issue related with db.create_all() SQLAlchemy Python3.6
            Asked 2021-Dec-21 at 10:01

            To summarize my problem, I try to generate my PostgreSQL database tables with the SQLAlchemy command db.create_all() and it returns the following error:



            Answered 2021-Dec-21 at 10:01

            Greetings to everyone who has been interested in this thread and special thanks to mechanical_meat for his support and assistance.

            I have learned a lot about python applications and the reasons why my application was failing. First of all I think that to understand the solution it is necessary that I comment my project structure:

            Source https://stackoverflow.com/questions/70206050


            Import json with missing keys into postgres with Flask-Sqlalchemy
            Asked 2021-Dec-14 at 12:29

            I have a question you guys might be able to answer.

            I have a json file that looks something like this:



            Answered 2021-Dec-13 at 21:35

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install flask-sqlalchemy

            You can install using 'pip install flask-sqlalchemy' or download it from GitHub, PyPI.
            You can use flask-sqlalchemy like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.


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